From the website, looks like the batteries are 750 mah. And the coils are on the bottom of the clearomizer, which is preferable right?
Personal preference. I like BCC (bottom coil), others like top coil with wicks. Others like cartomizer tanks. And so on.
Bottom coils do have a greater tendency to be a bit leaky and give drowned hits than any of the others. They're far less likely than the others to give a dry hit.
The tank is 2.4 ml which is pretty average from what I gather. How often should I change out the wicks? And I've read not to let my tank get below 0.6 ml, is that correct? And how often do i have to replace the tank?
The physical plastic tank is essentially immortal until broken, and I have a few that are going well past a year. I do make a habit of cleaning mine after every use and rotating my tanks (I have 12). Some liquids may damage the tank, most notably strong menthols and strong cinnamons, although I've never had a problem with either myself.
You can let the tank go below 0.6 ml, but you do run the risk of a dry hit doing that--you might run it dry. I do that occasionally, it's nasty but no harm done.
How long a wick/atomizer lasts you depends very much on how much you vape and your sensitivity to coil flavor changes. I run about 50 ml through any given coil before rebuilding it--about 5 days of total use in my case. You may find you're more or less sensitive to coil changes as they age and choose to replace them more or less often than I do.